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If I am using a CExtButton with the attached m_menu as the context menu, is it possible to get notification when the different menu items are highlighted as the mouse moves over the different menu items?

I need to update some information (other than tool/status tip) based on what item the mouse is over in the context menu. but i cant seem to find anyway that prof-uis notifies any window on this.

thanks!

Both menu items and toolbar buttons provides a notification about a change in the hovered/selected state. This notification is handled in the HelpNotes sample which demonstrates a custom tooltip based on an OLE-enabled rich editor window. You need to handle the CExtPopupMenuWnd::g_nMsgItemCoveringNotification registered windows message in the button’s parent window:

afx_msg LRESULT OnItemCoveringNotification( WPARAM wParam, LPARAM lParam );
    ON_REGISTERED_MESSAGE( CExtPopupMenuWnd::g_nMsgItemCoveringNotification, OnItemCoveringNotification )
LRESULT CMainFrame::OnItemCoveringNotification( WPARAM wParam, LPARAM lParam )
{
    lParam;
CExtPopupMenuWnd::ITEMCOVERINGNOTIFICATON * pICN =
        CExtPopupMenuWnd::ITEMCOVERINGNOTIFICATON::FromWPARAM( wParam );
    ASSERT( pICN != NULL );
    if(  pICN->m_eICN == CExtPopupMenuWnd::ITEMCOVERINGNOTIFICATON::__EICN_DELAY
        || pICN->m_eICN == CExtPopupMenuWnd::ITEMCOVERINGNOTIFICATON::__EICN_CANCEL
    )
    {
        pICN->m_bSuspendTips = false; // DO NOT CANCEL DEFAULT TIP WINDOWS IF NOT NEEDED
        // IF DELAYED ACTIVATION OF POPUP MENU OR CANCELED SELECTION
        // WE GUESS, THESE CASES ARE NOT INTERESTING
        return 0;
    }
    // HOVER/SELECTION CHANGED, THAT IS WHAT WE NEED
    ASSERT( pICN->m_eICN == CExtPopupMenuWnd::ITEMCOVERINGNOTIFICATON::__EICN_SET );
    pICN->m_bSuspendTips = true; // CANCEL DEFAULT TIP WINDOWS IN THIS CASE
UINT nCmdID = 0;
CRect rcItem( 0, 0, 0, 0 );
    if( pICN->m_pPopup != NULL )
    {
        // IF NOTIFICATION FROM MENU ITEM
        ASSERT( pICN->m_pTBB == NULL );
        ASSERT_VALID( pICN->m_pPopup );
        CExtPopupMenuWnd::MENUITEMDATA & _mii =
            pICN->m_pPopup->ItemGetInfo( pICN->m_nPopupItemIndex );
        if( _mii.IsSeparator() || _mii.IsPopup() )
            return 0; // NOT AN INTERESTING CASES
        nCmdID = _mii.GetCmdID(); // GET THE COMMAND IDENTIFIER IF NEEDED
        pICN->m_pPopup->_GetItemRect( pICN->m_nPopupItemIndex, rcItem );
        pICN->m_pPopup->ClientToScreen( &rcItem ); // GET THE ITEM RECTANGLE IF NEEDED
    } // if( pICN->m_pPopup != NULL )
    else
    {
        // IF NOTIFICATION FROM TOOLBAR BUTTON
        ASSERT_VALID( pICN->m_pTBB );
        ASSERT_VALID( pICN->m_pTBB->GetBar() );
        if( pICN->m_pTBB->IsAbleToTrackMenu() || pICN->m_pTBB->IsSeparator() )
            return 0; // NOT AN INTERESTING CASES
        nCmdID = pICN->m_pTBB->GetCmdID( false ); // GET THE COMMAND IDENTIFIER IF NEEDED
        rcItem = pICN->m_pTBB->Rect(); // GET THE ITEM RECTANGLE IF NEEDED
        pICN->m_pTBB->GetBar()->ClientToScreen( &rcItem );
    } // else from if( pICN->m_pPopup != NULL )
    // NOW WE HAVE nCmdID AND rcItem IN SCREEN COORDINATES
    . . .
 
    return 0;
}